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RONG Desheng,YANG Ganxing,HU Jushuang,YANG Xuepeng.Inductive Integrated Buck Converter with Switched-inductor Units[J].JOURNAL OF POWER SUPPLY,2018,16(3):23-27
Inductive Integrated Buck Converter with Switched-inductor Units
Received:March 09, 2016  Revised:January 17, 2018
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DOI:10.13234/j.issn.2095-2805.2018.3.23
Keywords:switched inductor  voltage gain  coupled inductance  Buck converter
Fund Project:National Natural Science Foundation of China
           
AuthorInstitutionEmail
RONG Desheng Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao , China
YANG Ganxing Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao , China 507503199@qq.com
HU Jushuang Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao , China
YANG Xuepeng Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao , China
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Abstract:
      To improve the step-down ability of the traditional Buck converter, reduce the voltage stress of diodes, and lower the loss of the converter, switched-inductors are applied to the traditional Buck converter, and an inductive integrated Buck converter with switched-inductors is presented. First, the switched-inductors are used to replace the storage inductors used in the traditional Buck converter, and they are further coupled/integrated. Second, the working mode of the converter is analyzed, and its voltage gain expression is obtained; moreover, the effect of the equivalent series resistance of inductors on the converter's voltage gain is studied. Third, the magnitudes of the voltage stress of diodes and the inductor current ripple are analyzed. Compared with the traditional Buck converter, the voltage gain, diode voltage stress, and inductor current ripple of the novel converter are all reduced to 1/(2-D) times. Finally, the experimental results of a prototype verified the correctness of the theoretical analysis, showing that the inductive integrated Buck converter with switched-inductors had excellent comprehensive performance.
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